Is it normal that after putting the male and the female together that during courtship they are flopping about? I have paired the male to 3 females in a cycle 3 days on 3 off since Nov 1st. They have locked up multiple times.
The last two times with this female I did not witness a lock, but perhaps they did. In the past I didn't hear anything nor see anything I just put them together and a few hours later saw they locked.

Now, I just put the male with the female and this time immediately they were flopping about inside. I heard flop sounds repeatedly like the tub was shaken. I also saw them cruising around on the ventilation holes (my tubs are opaque grey). I opened the tub and they sat still, but already peed all over. I saw the female on top of the male and it was the male who "pushed" the female off him and made a flopping sound.

I never saw this before and I have been pairing since november the 1st.